Communication method and communication apparatus

Abstract

The present application provides a communication method and a communication apparatus, which may be applied to a non-terrestrial communication network, for example, a satellite network, an unmanned aerial vehicle platform, and a high-altitude platform. In the method, a first terminal device receives first information and second information from a first node, the first information comprising common information for performing mobility management on at least one terminal device in at least one region corresponding to a second node, the second information including dedicated information for performing mobility management on the first terminal device, the at least one region including a region served by the first node, and the at least one terminal device including the first terminal device; on the basis of the first information and the second information, the first terminal device performs a mobility management process in the region served by the first node; and the first terminal device receives updated second information from the first node. By means of receiving only update dedicated information, the signaling overhead in the mobility management process of the first terminal device can be reduced.

Description

Communication method and communication device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on August 25, 2023, with application number 202311086821.7, and priority to the Chinese patent application with the invention name “Communication Method and Communication Device”, all contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of non-terrestrial communication technologies such as satellite networks, and more specifically, to a communication method and a communication device. Background Art

[0003] Non-terrestrial networks (NTN) include nodes such as satellite networks, high-altitude platforms and drones, and are closely related to the fifth generation (5 th The 5G generation (5G) communication systems together constitute a global integrated communication network with seamless coverage of sea, land, air, space and ground, which can meet the needs of various businesses.

[0004] In non-terrestrial networks (e.g., beam-hopping satellite communication systems), the movement of satellite nodes may cause group handover or group reselection of user equipment (UE) in a certain area. In group handover / group reselection triggered primarily by network (e.g., satellite) movement, the signaling overhead transmitted between the source and destination nodes is extremely high, and the efficiency of group handover / group reselection is low. For example, a single satellite covers 1.72×10 6 Taking an average service time of 5 minutes per square kilometer and assuming 10 radio resource control (RRC)-connected UEs per square kilometer, the inter-satellite (i.e., source and destination) signaling overhead associated with a single UE handover is approximately 23 Kbits. The inter-satellite signaling overhead associated with group handovers can reach several Gbps or even tens of Gbps. Therefore, efficient and low-cost UE mobility management in NTN scenarios is crucial.

[0005] Summary of the Invention

[0006] The present application provides a communication method and a communication device, which can reduce the signaling overhead of mobility management of terminal devices in NTN scenarios.

[0007] In a first aspect, a communication method is provided. The method may be executed by a first terminal device, or may be a chip or circuit configured in the first terminal device, which is not limited in this application. The following description assumes execution by the first terminal device.

[0008] The method includes: a first terminal device receives first information and second information from a first node, the first information includes public information for performing mobility management on at least one terminal device in at least one area corresponding to the second node, and the second information includes dedicated information for performing mobility management on the first terminal device, the at least one area includes an area served by the first node, and the at least one terminal device includes the first terminal device; the first terminal device executes a mobility management process in the area served by the first node based on the first information and the second information; the first terminal device receives the updated second information from the first node.

[0009] Based on the above solution, by dividing the information used for mobility management of terminal devices into public information and private information, and only receiving updated private information of terminal devices in the mobility management process of terminal devices, the signaling overhead of terminal devices in the mobility management process can be reduced.

[0010] In combination with the first aspect, in some implementations of the first aspect, the first node may be a node in the NTN, and the first node may carry part of the functions of the base station, for example, carrying part or all of the functions of the gNB-DU.

[0011] In combination with the first aspect, in some implementations of the first aspect, the first node is a first satellite, and the second node is a second satellite or a ground station corresponding to the first satellite.

[0012] In combination with the first aspect, in certain implementations of the first aspect, the first information includes at least one item of the following information: an identifier of the interface F1 application protocol AP between the first node and at least one node, a public measurement configuration, a public cell group configuration, a public wireless bearer configuration, and a public synchronization reconfiguration; wherein the at least one node includes the first node; and the second information includes at least one item of the following information: a dedicated measurement configuration of the first terminal device, a dedicated cell group configuration of the first terminal device, a dedicated wireless bearer configuration of the first terminal device, and a dedicated synchronization reconfiguration of the first terminal device.

[0013] In combination with the first aspect, in certain implementations of the first aspect, the public measurement configuration includes at least one of the following information: a measurement timing configuration SMTC based on a synchronization signal block, the location information of the second node, and the measurement priority of the at least one area; and the public synchronization reconfiguration includes at least one of the following information: the time domain configuration, preamble or frequency domain configuration of the access opportunity RO corresponding to the access target area in the mobility management process, and the validity period of the F1AP.

[0014] In combination with the first aspect, in certain implementations of the first aspect, the dedicated measurement configuration includes at least one of the following items: multiple measurement timing configurations SMTC based on synchronization signal blocks, a measurement timing configuration SMTC period extension factor based on synchronization signal blocks or a measurement timing configuration SMTC offset value based on synchronization signal blocks, and the ephemeris information of the first node; and the dedicated synchronization reconfiguration includes at least one of the following information: an extension factor and / or a continuous number of frames of the access opportunity RO corresponding to the access target area of ​​the mobility management process, and an offset value of the validity period of the F1AP.

[0015] In combination with the first aspect, in certain implementations of the first aspect, in an initial access process of the first terminal device, the first terminal device receives the first information and the second information from the first node.

[0016] In a second aspect, a communication method is provided. The method may be executed by a first node, or may be a chip or circuit configured in the first node, which is not limited in this application. The following description assumes execution by the first node.

[0017] The method includes: a first node sends first information and second information to a first terminal device, the first information including public information for performing mobility management on at least one terminal device in at least one area corresponding to the second node, and the second information including dedicated information for performing mobility management on the first terminal device, the at least one area including the area served by the first node, and the at least one terminal device including the first terminal device; the first node executes a mobility management process for the first terminal device in the area served by the first node based on a measurement report, and the measurement report is determined based on the first information and the second information; the first node sends the updated second information to the first terminal device.

[0018] Based on the above scheme, by dividing the information used for mobility management of terminal devices into public information and private information, and only sending updated private information of terminal devices in the mobility management process of terminal devices, the signaling overhead of the first node in the mobility management process can be reduced.

[0019] In combination with the second aspect, in some implementations of the second aspect, the first node may be a node in the NTN, and the first node may carry part of the functions of the base station, for example, carrying part or all of the functions of the gNB-DU.

[0020] In combination with the second aspect, in some implementations of the second aspect, the first node is a first satellite, and the second node is a second satellite or a ground station corresponding to the first satellite.

[0021] In combination with the second aspect, in certain implementations of the second aspect, the first information includes at least one item of the following information: an identifier of the interface F1 application protocol AP between the second node and at least one node, a public measurement configuration, a public cell group configuration, a public wireless bearer configuration, and a public synchronization reconfiguration; wherein the at least one node includes the first node; and the second information includes at least one item of the following information: a dedicated measurement configuration of the first terminal device, a dedicated cell group configuration of the first terminal device, a dedicated wireless bearer configuration of the first terminal device, and a dedicated synchronization reconfiguration of the first terminal device.

[0022] In combination with the second aspect, in certain implementations of the second aspect, the public measurement configuration includes at least one of the following information: a measurement timing configuration SMTC based on a synchronization signal block, the location information of the second node, and the measurement priority of the at least one area; and the public synchronization reconfiguration includes at least one of the following information: the time domain configuration, preamble or frequency domain configuration of the access opportunity RO corresponding to the access target area in the mobility management process, and the validity period of the F1AP.

[0023] In combination with the second aspect, in certain implementations of the second aspect, the dedicated measurement configuration includes at least one of the following items: multiple measurement timing configurations SMTC based on synchronization signal blocks, a measurement timing configuration SMTC period extension factor based on synchronization signal blocks or a measurement timing configuration SMTC offset value based on synchronization signal blocks, and the ephemeris information of the first node; and the dedicated synchronization reconfiguration includes at least one of the following information: an extension factor and / or a continuous number of frames of the access opportunity RO corresponding to the access target area of ​​the mobility management process, and an offset value of the validity period of the F1AP.

[0024] In combination with the second aspect, in some implementations of the second aspect, the method further includes: the first node receiving the first information from the second node.

[0025] In combination with the second aspect, in certain implementations of the second aspect, in an initial access process of the first terminal device, the first node receives the first information from the second node.

[0026] In combination with the second aspect, in certain implementations of the second aspect, in an initial access process of the first terminal device, the first node sends the first information and the second information to the first terminal device.

[0027] In a third aspect, a communication method is provided. The method may be executed by a first terminal device, or may be a chip or circuit configured in the first terminal device, which is not limited in this application. The following description assumes execution by the first terminal device.

[0028] The method includes: a first terminal device receives first information and second information from a first node, the first information includes public information for performing mobility management on at least one terminal device in at least one area corresponding to the second node, the second information includes dedicated information for performing mobility management on the first terminal device, the at least one area includes an area served by the first node, and the at least one terminal device includes the first terminal device; the first terminal device executes a mobility management process from the area served by the first node to the first area based on the first information and the second information, and the first area is an area served by a third node; the first terminal device receives third information from the third node, the third information includes dedicated information for performing mobility management on the first terminal device, the third information is determined by the third node, and the at least one area includes an area served by the third node.

[0029] Based on the above scheme, by dividing the information used for mobility management of terminal devices into public information and private information, and only receiving the private information of the terminal device in the mobility management process of the terminal device from the area served by one node to the area served by another node, the signaling overhead of the terminal device in the mobility management process can be reduced.

[0030] In combination with the third aspect, in certain implementations of the third aspect, the first node and the third node may be nodes in the NTN, and the first node and the third node may carry part of the functions of the base station, for example, carrying part or all of the functions of the gNB-DU.

[0031] In combination with the third aspect, in certain implementations of the third aspect, the first node is a first satellite, the second node is a second satellite or a ground station corresponding to the first satellite, and the third node is a third satellite.

[0032] In combination with the third aspect, in certain implementations of the third aspect, the first information includes at least one of the following information: an identifier of the F1 interface application protocol between the second node and at least one node, a public measurement configuration, a public cell group configuration, a public wireless bearer configuration, and a public synchronization reconfiguration; wherein the at least one node includes the first node and the third node; and the third information includes at least one of the following information: a dedicated measurement configuration of the first terminal device, a dedicated cell group configuration of the first terminal device, a dedicated wireless bearer configuration of the first terminal device, and a dedicated synchronization reconfiguration of the first terminal device.

[0033] In combination with the third aspect, in certain implementations of the third aspect, the public measurement configuration includes at least one of the following information: a measurement timing configuration SMTC based on a synchronization signal block, the location information of the second node, and the measurement priority of the at least one area; and the public synchronization reconfiguration includes at least one of the following information: the time domain configuration, preamble or frequency domain configuration of the access opportunity RO corresponding to the access target area in the mobility management process, and the validity period of the F1AP.

[0034] In combination with the third aspect, in certain implementations of the third aspect, the dedicated measurement configuration includes at least one of the following items: multiple SMTCs, an SMTC period extension factor or an SMTC offset value, and the ephemeris information of the first node; and the dedicated synchronization reconfiguration includes at least one of the following information: the extension factor and / or the number of consecutive frames of the access opportunity RO corresponding to the access target area of ​​the mobility management process, and the offset value of the validity period of the F1AP.

[0035] In combination with the third aspect, in certain implementations of the third aspect, in an initial access process of the first terminal device, the first terminal device receives the first information and the second information from the first node.

[0036] In a fourth aspect, a communication method is provided. The method may be executed by a third node, or may be a chip or circuit configured in the third node, which is not limited in this application. The following description assumes execution by the third node.

[0037] The method includes: a third node executes a mobility management process for a first terminal device from an area served by the first node to a first area, the first area being an area served by the third node, the execution of the mobility management process being determined based on first information and second information, the first information including public information for mobility management of at least one terminal device in at least one area corresponding to the second node, the second information including dedicated information for mobility management of the first terminal device, the second information being determined by the first node, the at least one area including an area served by the first node and an area served by the third node, the at least one terminal device including the first terminal device; the third node sends third information to the first terminal device, the third information including dedicated information for mobility management of the first terminal device, the third information being determined by the third node.

[0038] Based on the above scheme, by dividing the information used for mobility management of terminal devices into public information and private information, and only sending the private information of the terminal device in the mobility management process of the terminal device from the area served by one node to the area served by another node (such as a third node), the signaling overhead of the third node in the mobility management process can be reduced.

[0039] In combination with the fourth aspect, in certain implementations of the fourth aspect, the first node and the third node may be nodes in the NTN, and the first node and the third node may carry part of the functions of the base station, for example, carrying part or all of the functions of the gNB-DU.

[0040] In combination with the fourth aspect, in certain implementations of the fourth aspect, the first node is a first satellite, the second node is a second satellite or a ground station corresponding to the first satellite, and the third node is a third satellite.

[0041] In combination with the fourth aspect, in certain implementations of the fourth aspect, the first information includes at least one item of the following information: an identifier of the interface F1 application protocol AP between the second node and at least one node, a public measurement configuration, a public cell group configuration, a public wireless bearer configuration, and a public synchronization reconfiguration; wherein the at least one node includes the first node and the third node; and the third information includes at least one item of the following information: a dedicated measurement configuration of the first terminal device, a dedicated cell group configuration of the first terminal device, a dedicated wireless bearer configuration of the first terminal device, and a dedicated synchronization reconfiguration of the first terminal device.

[0042] In combination with the fourth aspect, in certain implementations of the fourth aspect, the public measurement configuration includes at least one of the following information: a measurement timing configuration SMTC based on a synchronization signal block, the location information of the second node, and the measurement priority of the at least one area; and the public synchronization reconfiguration includes at least one of the following information: the time domain configuration, preamble or frequency domain configuration of the access opportunity RO corresponding to the access target area in the mobility management process, and the validity period of the F1AP.

[0043] In combination with the fourth aspect, in certain implementations of the fourth aspect, the dedicated measurement configuration includes at least one of the following items: multiple measurement timing configurations SMTC based on synchronization signal blocks, a measurement timing configuration SMTC period extension factor based on synchronization signal blocks or a measurement timing configuration SMTC offset value based on synchronization signal blocks, and the ephemeris information of the first node; and the dedicated synchronization reconfiguration includes at least one of the following information: an extension factor and / or a continuous number of frames of the access opportunity RO corresponding to the target area accessed by the mobility management process, and an offset value of the validity period of the F1AP.

[0044] In combination with the fourth aspect, in certain implementations of the fourth aspect, the first information and the second information are sent by the first node during an initial access process of the first terminal device.

[0045] In a fifth aspect, a communication device is provided, which includes a transceiver unit and a processing unit. The transceiver unit is used to receive first information and second information from a first node, the first information including public information for mobility management of at least one terminal device in at least one area corresponding to the second node, and the second information including dedicated information for mobility management of the device, the at least one area including the area served by the first node, and the at least one terminal device including the device; the processing unit is used to execute the mobility management process in the area served by the first node based on the first information and the second information; the transceiver unit is also used to receive the updated second information from the first node.

[0046] In combination with the fifth aspect, in certain implementations of the fifth aspect, the first node may be a node in the NTN, and the first node may carry part of the functions of the base station, for example, carrying part or all of the functions of the gNB-DU.

[0047] In combination with the fifth aspect, in certain implementations of the fifth aspect, the first node is a first satellite, and the second node is a second satellite or a ground station corresponding to the first satellite.

[0048] In combination with the fifth aspect, in certain implementations of the fifth aspect, the first information includes at least one of the following information: an identifier of the interface F1 application protocol AP between the first node and at least one node, a public measurement configuration, a public cell group configuration, a public wireless bearer configuration, and a public synchronization reconfiguration; wherein the at least one node includes the first node; and the second information includes at least one of the following information: a dedicated measurement configuration of the device, a dedicated cell group configuration of the device, a dedicated wireless bearer configuration of the device, and a dedicated synchronization reconfiguration of the device.

[0049] In combination with the fifth aspect, in certain implementations of the fifth aspect, the public measurement configuration includes at least one of the following information: a measurement timing configuration SMTC based on a synchronization signal block, the location information of the second node, and the measurement priority of the at least one area; and the public synchronization reconfiguration includes at least one of the following information: the time domain configuration, preamble or frequency domain configuration of the access opportunity RO corresponding to the access target area in the mobility management process, and the validity period of the F1AP.

[0050] In combination with the fifth aspect, in certain implementations of the fifth aspect, the dedicated measurement configuration includes at least one of the following items: multiple measurement timing configurations SMTC based on synchronization signal blocks, a measurement timing configuration SMTC period extension factor based on synchronization signal blocks or a measurement timing configuration SMTC offset value based on synchronization signal blocks, and the ephemeris information of the first node; and the dedicated synchronization reconfiguration includes at least one of the following information: an extension factor and / or a continuous number of frames of the access opportunity RO corresponding to the target area accessed by the mobility management process, and an offset value of the validity period of the F1AP.

[0051] In combination with the fifth aspect, in certain implementations of the fifth aspect, in an initial access process of the device, the device receives the first information and the second information from the first node.

[0052] In a sixth aspect, a communication device is provided, which includes a transceiver unit and a processing unit, the transceiver unit being used to send first information and second information to a first terminal device, the first information including public information for mobility management of at least one terminal device in at least one area corresponding to the second node, the second information including dedicated information for mobility management of the first terminal device, the at least one area including the area served by the device, and the at least one terminal device including the first terminal device; the processing unit being used to execute the mobility management process of the first terminal device in the area served by the device based on a measurement report, the measurement report being determined based on the first information and the second information; the transceiver unit being further used to send the updated second information to the first terminal device.

[0053] In combination with the sixth aspect, in certain implementations of the sixth aspect, the device may be a node in the NTN, and the device may carry part of the functions of the base station, for example, carrying part or all of the functions of the gNB-DU.

[0054] In combination with the sixth aspect, in certain implementations of the sixth aspect, the device is a first satellite, and the second node is a second satellite or a ground station corresponding to the first satellite.

[0055] In combination with the sixth aspect, in certain implementations of the sixth aspect, the first information includes at least one of the following information: an identifier of the interface F1 application protocol AP between the second node and at least one node, a public measurement configuration, a public cell group configuration, a public wireless bearer configuration, and a public synchronization reconfiguration; wherein the at least one node includes the device; and the second information includes at least one of the following information: a dedicated measurement configuration of the first terminal device, a dedicated cell group configuration of the first terminal device, a dedicated wireless bearer configuration of the first terminal device, and a dedicated synchronization reconfiguration of the first terminal device.

[0056] In combination with the sixth aspect, in certain implementations of the sixth aspect, the public measurement configuration includes at least one of the following information: a measurement timing configuration SMTC based on a synchronization signal block, the location information of the second node, and the measurement priority of the at least one area; and the public synchronization reconfiguration includes at least one of the following information: the time domain configuration, preamble or frequency domain configuration of the access opportunity RO corresponding to the access target area in the mobility management process, and the validity period of the F1AP.

[0057] In combination with the sixth aspect, in certain implementations of the sixth aspect, the dedicated measurement configuration includes at least one of the following items: multiple measurement timing configurations SMTC based on synchronization signal blocks, a measurement timing configuration SMTC period extension factor based on synchronization signal blocks or a measurement timing configuration SMTC offset value based on synchronization signal blocks, and the ephemeris information of the device; and the dedicated synchronization reconfiguration includes at least one of the following information: an extension factor and / or a continuous number of frames of the access opportunity RO corresponding to the target area accessed by the mobility management process, and an offset value of the validity period of the F1AP.

[0058] In combination with the sixth aspect, in certain implementations of the sixth aspect, the transceiver unit is further used to receive the first information from the second node.

[0059] In combination with the sixth aspect, in certain implementations of the sixth aspect, the transceiver unit is specifically used to receive the first information from the second node during the initial access process of the first terminal device.

[0060] In combination with the sixth aspect, in certain implementations of the sixth aspect, the transceiver unit is specifically used to send the first information and the second information to the first terminal device during the initial access process of the first terminal device.

[0061] In the seventh aspect, a communication device is provided, which includes a transceiver unit and a processing unit. The transceiver unit is used to receive first information and second information from a first node, the first information including public information for mobility management of at least one terminal device in at least one area corresponding to the second node, and the second information including dedicated information for mobility management of the device, the at least one area including the area served by the first node, and the at least one terminal device including the device; the processing unit is used to execute a mobility management process from the area served by the first node to the first area based on the first information and the second information, and the first area is the area served by a third node; the transceiver unit is also used to receive third information from the third node, the third information including dedicated information for mobility management of the device, the third information is determined by the third node, and the at least one area includes the area served by the third node.

[0062] In combination with the seventh aspect, in certain implementations of the seventh aspect, the first node and the third node may be nodes in the NTN, and the first node and the third node may carry part of the functions of the base station, for example, carrying part or all of the functions of the gNB-DU.

[0063] In combination with the seventh aspect, in some implementations of the seventh aspect, the first node is a first satellite, the second node is a second satellite or a ground station corresponding to the first satellite, and the third node is a third satellite.

[0064] In combination with the seventh aspect, in certain implementations of the seventh aspect, the first information includes at least one item of the following information: an identifier of the F1 interface application protocol between the second node and at least one node, a public measurement configuration, a public cell group configuration, a public wireless bearer configuration, and a public synchronization reconfiguration; wherein the at least one node includes the first node and the third node; and the third information includes at least one item of the following information: a dedicated measurement configuration of the device, a dedicated cell group configuration of the device, a dedicated wireless bearer configuration of the device, and a dedicated synchronization reconfiguration of the device.

[0065] In combination with the seventh aspect, in certain implementations of the seventh aspect, the public measurement configuration includes at least one of the following information: a measurement timing configuration SMTC based on a synchronization signal block, the location information of the second node, and the measurement priority of the at least one area; and the public synchronization reconfiguration includes at least one of the following information: the time domain configuration, preamble or frequency domain configuration of the access opportunity RO corresponding to the access target area in the mobility management process, and the validity period of the F1AP.

[0066] In combination with the seventh aspect, in certain implementations of the seventh aspect, the dedicated measurement configuration includes at least one of the following items: multiple SMTCs, an SMTC period extension factor or an SMTC offset value, and the ephemeris information of the first node; and the dedicated synchronization reconfiguration includes at least one of the following information: the extension factor and / or the number of consecutive frames of the access timing RO corresponding to the access target area of ​​the mobility management process, and the offset value of the validity period of the F1AP.

[0067] In combination with the seventh aspect, in certain implementations of the seventh aspect, the transceiver unit is specifically used to receive the first information and the second information from the first node during an initial access process of the device.

[0068] In an eighth aspect, a communication device is provided, which includes a transceiver unit and a processing unit, wherein the processing unit is used to execute a mobility management process for a first terminal device from an area served by a first node to a first area, wherein the first area is an area served by the device, and the execution of the mobility management process is determined based on first information and second information, wherein the first information includes public information for mobility management of at least one terminal device in at least one area corresponding to the second node, and the second information includes dedicated information for mobility management of the first terminal device, and the second information is determined by the first node, the at least one area includes the area served by the first node and the area served by the device, and the at least one terminal device includes the first terminal device; the transceiver unit is used to send third information to the first terminal device, wherein the third information includes dedicated information for mobility management of the first terminal device, and the third information is determined by the device.

[0069] In combination with the eighth aspect, in certain implementations of the eighth aspect, the first node and the device may be nodes in the NTN, and the first node and the device may carry part of the functions of the base station, for example, carrying part or all of the functions of the gNB-DU.

[0070] In combination with the eighth aspect, in certain implementations of the eighth aspect, the first node is a first satellite, the second node is a second satellite or a ground station corresponding to the first satellite, and the device is a third satellite.

[0071] In combination with the eighth aspect, in certain implementations of the eighth aspect, the first information includes at least one item of the following information: an identifier of the interface F1 application protocol AP between the second node and at least one node, a public measurement configuration, a public cell group configuration, a public wireless bearer configuration, and a public synchronization reconfiguration; wherein the at least one node includes the first node and the device; and the third information includes at least one item of the following information: a dedicated measurement configuration of the first terminal device, a dedicated cell group configuration of the first terminal device, a dedicated wireless bearer configuration of the first terminal device, and a dedicated synchronization reconfiguration of the first terminal device.

[0072] In combination with the eighth aspect, in certain implementations of the eighth aspect, the public measurement configuration includes at least one of the following information: a measurement timing configuration SMTC based on a synchronization signal block, the location information of the second node, and the measurement priority of the at least one area; and the public synchronization reconfiguration includes at least one of the following information: the time domain configuration, preamble or frequency domain configuration of the access opportunity RO corresponding to the access target area in the mobility management process, and the validity period of the F1AP.

[0073] In combination with the eighth aspect, in certain implementations of the eighth aspect, the dedicated measurement configuration includes at least one of the following items: multiple measurement timing configurations SMTC based on synchronization signal blocks, a measurement timing configuration SMTC period extension factor based on synchronization signal blocks or a measurement timing configuration SMTC offset value based on synchronization signal blocks, and the ephemeris information of the first node; and the dedicated synchronization reconfiguration includes at least one of the following information: an extension factor and / or a continuous number of frames of the access opportunity RO corresponding to the access target area of ​​the mobility management process, and an offset value of the validity period of the F1AP.

[0074] In combination with the eighth aspect, in certain implementations of the eighth aspect, the first information and the second information are sent by the first node during the initial access process of the first terminal device.

[0075] In a ninth aspect, the present application provides a communication device. In one design, the communication device may include a module for performing the methods / operations / steps / actions described in any one of the first to fourth aspects, or any implementation of the first to fourth aspects. The module may be a hardware circuit, software, or a combination of hardware circuits and software. In one design, the communication device may include a processing module and a communication module.

[0076] In a tenth aspect, the present application provides a communication device, the communication device including a processor for implementing the method described in the first aspect or the third aspect, or any implementation of the first aspect or the third aspect. The processor is coupled to a memory, and the memory is used to store instructions and data. When the processor executes the instructions stored in the memory, the method described in the first aspect or the second aspect, or any implementation of the first aspect or the second aspect can be implemented. Optionally, the communication device may also include a memory. Optionally, the communication device may also include a communication interface, and the communication interface is used for the device to communicate with other devices. Exemplarily, the communication interface may be a transceiver, a hardware circuit, a bus, a module, a pin or other type of communication interface. In one example, the communication device may be a network device, such as an access network device, or it may be a device, module or chip set in the network device, or a device that can be used in conjunction with the network device.

[0077] In an eleventh aspect, the present application provides a communication device, comprising a processor for implementing the method described in the second aspect or the fourth aspect, or any implementation of the second aspect or the fourth aspect. The processor is coupled to a memory, and the memory is used to store instructions and data. When the processor executes the instructions stored in the memory, the method described in the third aspect or the fourth aspect, or any implementation of the third aspect or the fourth aspect can be implemented. Optionally, the communication device may further include a memory. Optionally, the communication device may further include a communication interface, and the communication interface is used for the device to communicate with other devices. Exemplarily, the communication interface may be a transceiver, a hardware circuit, a bus, a module, a pin, or other types of communication interfaces. In one example, the communication device may be a terminal device, or it may be a device, a module, a chip, etc. provided in the terminal device, or a device that can be used in conjunction with the terminal device.

[0078] In a twelfth aspect, the present application provides a communication system, comprising a first node and a third node, and optionally further comprising at least one of a terminal device and a second node.

[0079] In the thirteenth aspect, the present application also provides a computer program, which, when run on a computer, enables the computer to execute the method provided in any aspect of the first to fourth aspects above, or any implementation of the first to fourth aspects.

[0080] In the fourteenth aspect, the present application also provides a computer program product, comprising instructions, which, when executed on a computer, enable the computer to execute the method provided in any one of the above-mentioned aspects 1 to 4, or any one of the implementations of the first to fourth aspects.

[0081] In the fifteenth aspect, the present application also provides a computer-readable storage medium, which stores a computer program or instruction. When the computer program or instruction is run on a computer, the computer executes the method provided in any aspect of the first to fourth aspects above, or any implementation of the first to fourth aspects.

[0082] In the sixteenth aspect, the present application also provides a chip, which is used to read a computer program stored in a memory and execute the method provided by any one of the implementations of the first to fourth aspects above; or, the chip includes a circuit for executing the method provided by any one of the first to fourth aspects above, or any one of the first to fourth aspects.

[0083] In a seventeenth aspect, the present application further provides a chip system, which includes a processor for supporting a device to implement any aspect of the first to fourth aspects above, or the method provided by any implementation of the first to fourth aspects. In one possible design, the chip system also includes a memory, which is used to store the necessary programs and data for the device. The chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0084] For the technical effects of the solutions provided by any of the ninth to seventeenth aspects or any of their implementation methods, please refer to the corresponding description of the first aspect and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0085] FIG1 is a schematic diagram of a communication system suitable for use in the present application.

[0086] FIG2 is a schematic diagram of the architecture of satellite communications.

[0087] FIG3 is a schematic diagram of a beam-hopping satellite communication system.

[0088] FIG4 is a schematic diagram of a group handover problem in a beam-hopping satellite communication system.

[0089] FIG5 is a schematic flowchart of a communication method 500 provided in this application.

[0090] FIG6 is a schematic diagram of the service ranges of a first node and a second node.

[0091] FIG7 is a schematic flowchart of a communication method 700 provided in this application.

[0092] FIG8 is a schematic flowchart of an initial access provided by the present application.

[0093] FIG9 is a schematic flowchart of a communication method 900 provided in this application.

[0094] FIG10 is a schematic flowchart of a communication method 1000 provided in this application.

[0095] FIG11 is a schematic block diagram of a communication device 1000 provided in an embodiment of the present application.

[0096] FIG12 is a schematic block diagram of a communication device 2000 provided in an embodiment of the present application.

[0097] FIG13 is a schematic block diagram of a chip system 3000 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0098] The technical solution in this application will be described below with reference to the accompanying drawings.

[0099] The technical solution of the present application can be applied to satellite communication systems, high altitude platform station (HAPS) communications, drones and other non-terrestrial network (NTN) systems, such as integrated communication and navigation (IcaN) systems, global navigation satellite systems (GNSS) and ultra-dense low-orbit satellite communication systems. Satellite communication systems can be integrated with traditional mobile communication systems. For example, the mobile communication system can be a fourth generation (4G) th generation, 4G) communication systems (e.g., long term evolution (LTE) systems), worldwide interoperability for microwave access (WiMAX) communication systems, fifth generation (5 th generation, 5G) communication system, the sixth generation (6 th generation, 6G) communication systems, and potentially applicable future mobile communication systems, etc.

[0100] The NTN, which includes nodes such as satellite networks, high-altitude platforms, and drones, boasts significant advantages, including global coverage, long-distance transmission, flexible networking, easy deployment, and freedom from geographical constraints. It has been widely used in a variety of fields, including maritime communications, positioning and navigation, disaster relief, scientific experiments, video broadcasting, and Earth observation. The integration of terrestrial 5G networks and satellite networks, leveraging their strengths and complementing their weaknesses, will form a seamless, integrated global communications network covering land, sea, air, space, and ground, meeting the diverse service needs of users.

[0101] As an important component of the NTN, the next-generation satellite network generally shows a trend of ultra-dense and heterogeneous. First, the scale of the satellite network has grown from 66 satellites in the Iridium constellation to 720 satellites in the OneWeb constellation, and will eventually extend to the Starlink ultra-dense LEO satellite constellation of more than 12,000. Second, the satellite network presents heterogeneous characteristics, developing from traditional single-layer communication networks to multi-layer communication networks. The functions of communication satellite networks are also becoming more complex and diversified, gradually becoming compatible with and supporting functions such as navigation enhancement, earth observation, and multi-dimensional information on-orbit processing.

[0102] FIG1 is a schematic diagram of an NTN communication system applicable to an embodiment of the present application. The NTN (satellite) communication system includes satellites 101, 102, and 103. Each satellite can provide services to terminal devices through multiple beams, such as communication services, navigation services, and positioning services. The satellites in this scenario are low earth orbit (LEO) satellites. Satellite 103 is connected to ground station equipment. The satellites use multiple beams to cover the service area, and different beams can communicate through one or more of time division, frequency division, and space division. The satellites communicate wirelessly with terminal devices by broadcasting communication signals and navigation signals. The satellites can communicate wirelessly with ground station equipment.

[0103] In addition, satellite communication systems can include transparent satellite architectures and non-transparent satellite architectures. Transparent transmission is also called bent-pipe forwarding transmission: the signal only undergoes frequency conversion, signal amplification, and other processes on the satellite, and the satellite is transparent to the signal. Non-transparent transmission is also called regenerative (on-board access / processing) transmission: the satellite has some or all base station functions. For example, satellites 101 and 102 in Figure 1 have non-transparent satellite architectures, and satellite 103 has a transparent satellite architecture. In addition, satellites can operate in staring (quasi earth-fixed) mode or non-staring (earth-moving) mode.

[0104] The terminal devices mentioned in the embodiments of the present application may include various communication kits (such as communication kits with wireless communication capabilities, which may include, for example, antennas, power supply templates, cables, and Wi-Fi modules), handheld devices, vehicle-mounted devices, or other processing devices connected to a wireless modem. Specifically, they may refer to user equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. The terminal device may also be a communication module with satellite communication capabilities, a satellite phone or its components, a very small aperture terminal (VSAT), a wireless modem, a machine type communication device, or other processing devices connected to a wireless modem. It may also be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a terminal in self-driving, a terminal in remote medical, a terminal in a smart grid, a terminal in transportation safety, a terminal in a smart city, a terminal in a smart home, or a terminal device in a future communication network, etc. Of course, the terminal device in this application may also refer to a chip, a modem, a system on a chip (SoC) or a communication platform that may include a radio frequency (RF) part, which is mainly responsible for the relevant communication functions in the device.

[0105] The ground station equipment can be a device in the core network (CN) of an existing mobile communication architecture (such as the 3rd generation partnership project (3GPP) access architecture of a 5G network), or a device in the core network of a future mobile communication architecture, a device used for connecting a satellite to a core network, or a relay device used for satellite communication. Among them, the core network provides an interface to the data network as a bearer network, and is used to provide communication connection, authentication, management, policy control, and data service carrying for the UE. The CN may further include: an access and mobility management function (AMF), a session management function (SMF), an authentication server function (AUSF), a policy control function (PCF), a user plane function (UPF), etc. Among them, the AMF network element is used to manage the access and mobility of the UE, and is mainly responsible for UE authentication, UE mobility management, UE paging, and other functions.

[0106] The network device may include, but is not limited to, an evolved Node B (eNB), a baseband unit (BBU), an access point (AP) in a wireless fidelity (WIFI) system, a wireless relay node, a wireless backhaul node, a transmission point (TP), or a transmission reception point (TRP). The network device may also be a gNB, TRP, or TP in a 5G system, or one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system. In addition, the network device may also be a network node constituting a gNB or TP, such as a BBU. Alternatively, the network device is a device-to-device (D2D) communication system, a machine-to-machine (M2M) communication system, an Internet of Things (IoT), an Internet of Vehicles communication system, or a device that performs network-side functions in other communication systems.

[0107] The network devices involved in the embodiments of the present application may include centralized units (CU) and / or distributed units (DU). CU and DU can be understood as the division of network devices from a logical functional perspective. CU and DU can be physically separated or deployed together. Multiple DUs can share one CU. One DU can also be connected to multiple CUs. The CU and DU can be connected through an interface, such as an F1 interface.

[0108] The CU and DU can be divided according to the protocol layers of the wireless network. One possible division is that the CU is used to perform the functions of the radio resource control (RRC), service data adaptation protocol (SDAP), and packet data convergence protocol (PDCP) layers, while the DU is used to perform the functions of the radio link control (RLC), media access control (MAC), and physical (PHY) layers.

[0109] It will be understood that the above division of the processing functions of the CU and DU according to the protocol layer is only an example, and the CU and DU may also be divided in other ways. For example, the CU or DU may be divided into functions of more protocol layers than the above division method. For example, the CU or DU may also be divided into some processing functions of the protocol layer in the above division method.

[0110] Alternatively, the functions of the CU or DU can be divided according to service type or other system requirements, for example, by latency, where functions whose processing time meets the latency requirement are implemented in the DU, while functions that do not meet the latency requirement are implemented in the CU.

[0111] Alternatively, a CU can also have one or more core network functions. One or more CUs can be centrally located or separately located. For example, a CU can be located on the network side for centralized management. A DU can have multiple radio frequency functions, or the radio frequency functions can be remotely located.

[0112] The functions of the CU can be implemented by a single entity or by different entities. For example, the functions of the CU can be further divided, such as separating the control plane (CP) and the user plane (UP). That is, the CU is divided into the control plane (CU-CP) and the CU user plane (CU-UP). The CU-CP can also include a further divided architecture, that is, dividing the CU-CP into CU-CP1 and CU-CP2. CU-CP1 can include various radio resource management functions, and CU-CP2 can include RRC functions and PDCP-C functions (i.e., the basic functions of control plane signaling at the PDCP layer).

[0113] In different systems, CU (including CU-CP or CU-UP) or DU may have different names, but those skilled in the art can understand their meanings. For example, in an open radio access network (O-RAN) system, CU may be referred to as an open CU (open CU, O-CU), and DU may be referred to as an open DU (open DU, O-DU). Alternatively, CU-CP may be referred to as O-CU-CP, and CU-UP may be referred to as O-CU-UP. For the sake of convenience, this application takes CU and DU as examples for description.

[0114] The satellites mentioned in the embodiments of the present application may be LEO satellites, medium orbit earth satellites (MEO) satellites, geosynchronous orbit (GEO) satellites, etc., and may also be satellite base stations, or orbital receivers or repeaters for relaying information, or network equipment carried on satellites, that is, satellites have some or all of the functions of network equipment. For example, satellites can serve as gNB-DUs. Satellites can provide services to ground terminal equipment through multiple beams. When a satellite uses multiple beams to cover a service area, different beams can provide services to the service area through one or more of time division, frequency division, and space division. Different beams can also use different polarization modes, such as circular polarization (including left-hand circular polarization and right-hand circular polarization). Satellites can communicate wirelessly with terminal equipment through broadcast communication signals and navigation signals. In addition, satellites can communicate wirelessly with ground station equipment.

[0115] Based on the operating mode of the payload (e.g., beam), satellite communication systems can generally be divided into staring (earth-fixed or quasi-earth-fixed) satellite communication systems and non-staring (earth-moving) satellite communication systems. As shown in Figure 2(a), the beam coverage of satellites (e.g., satellite #1, satellite #2, and satellite #3) in a non-staring satellite communication system moves with the satellites over a period of time (e.g., time T1, time T2, and time T3). As shown in Figure 2(b), in a staring satellite communication system, satellites dynamically adjust their beam pointing so that the beam covers approximately the same area on the ground over a period of time.

[0116] To facilitate understanding of the embodiments of the present application, the terms that may be involved in the present application are explained.

[0117] 1. Wave position

[0118] The service area of ​​a satellite network can be divided into multiple smaller geographic areas based on geographic location. Each geographic area can be referred to as a beam. Alternatively, beams in this application can be expressed as geographic areas, regions, or service areas. Furthermore, beams can be represented by various shapes, such as one or more of a regular hexagon, a pentagon, a circle, an ellipse, and a rectangle.

[0119] 2. Beam-hopping satellite communication system

[0120] Generally speaking, the coverage range of a single satellite is very wide, reaching several thousand or even tens of thousands of kilometers; the coverage range of a single beam can be as small as tens of meters or even several kilometers. Therefore, to support wide-area coverage, a single satellite is usually equipped with hundreds or even thousands of beams, which poses a huge challenge to the payload of satellites, especially LEO satellites. To alleviate the contradiction between small payload (such as beams) and wide coverage of a single satellite, beam-hopping satellite communication systems have come into being. Specifically, in a beam-hopping satellite communication system, a single satellite is equipped with only a small number of beams (such as a few or dozens of beams), and the beams are used in a time-sharing manner to serve the coverage area of ​​the single satellite.

[0121] Figure 3 is a schematic diagram of a beam-hopping satellite communication system. As shown in Figure 3, a satellite forms four beams at a time to cover their corresponding areas (i.e., beam positions). For example, at time T1, beams 0, 1, 4, and 5 are formed; at time T2, beams 2, 3, 6, and 7 are formed, and so on. Time-sharing at times T1, T2, T3, and T4 allows the satellite to serve all areas covered by the satellite (i.e., the areas corresponding to the 16 beams).

[0122] 3. Mobility Management

[0123] In a beam-hopping satellite communication system, the movement of satellite nodes may cause group handover (connected UEs) or group reselection (idle UEs or inactive UEs) of UEs within a certain area.

[0124] Figure 4 is a schematic diagram of a group handover. As shown in Figure 4, at time T1, one or more beams of satellite SAT-2 serve UE cluster (UE-Group) 1 located in a single beam position of zone (Zone)-2, abbreviated as UE-G1 (UE-G1 contains at least one UE); at time T2, due to the movement of satellite SAT-2, satellite SAT-2 cannot serve UE-G1, and one or more beams of satellite SAT-1 take over from satellite SAT-2 to serve UE-G1. Therefore, group handover may occur for UE-G1. In addition, due to the high speed of satellite movement, for example, about 7.5 km / s, the frequency of group handover for UE clusters within the satellite coverage area is about once every few seconds to tens of seconds. In other words, in a beam-hopping satellite communication system, group handover or group reselection triggered mainly by satellite node movement becomes the norm. Mobility management of UE clusters within the coverage area of ​​a single satellite may incur huge inter-satellite or inter-cell signaling overhead (taking cell handover as an example, the inter-satellite overhead of a single handover is about 23Kbits, and the total overhead can reach several Gbps or even tens of Gbps).

[0125] Mobility management mainly includes cell handover, cell reselection, registration update, and tracking area update. Taking cell handover as an example, the handover process of the terrestrial network mainly includes the following steps:

[0126] 1) Cell handover measurement: The network sends measurement configurations corresponding to multiple cells (including serving cells and neighboring cells) to the UE. The UE measures the signal quality of the cells based on the measurement configurations, such as reference signal received power (RSRP) and reference signal received quality (RSRQ).

[0127] 2) Measurement result reporting: The UE reports the measurement results to the network. Reporting can be done periodically or by event triggering. In event triggering, the reporting conditions are usually configured as the signal quality of the serving cell is less than a preset threshold and / or the signal quality of the neighboring cell is greater than a preset threshold.

[0128] 3) Handover decision: The network selects a suitable neighboring cell based on the reported measurement results and interacts with the UE to determine handover-related context information, admission control, and reserved resources.

[0129] 4) Handover execution: The UE receives handover-related control information from the serving cell and completes the access process in the target cell.

[0130] During handover, the UE requires a dedicated random access preamble, which is different from the contention-based random access preamble used during initial access. Furthermore, the random access channel (RACH) periodicity during handover supports configurations of 10 / 20 / 40 / 80 / 160ms, the same as the RACH periodicity used during initial access.

[0131] For cell reselection, the network side usually sends neighboring cell-related measurement configuration and other parameters to the UE in the form of broadcast. The UE compares its own measurement values ​​(such as RSRQ, RSRP, etc.) with the parameters sent by the network (such as reselection threshold), and autonomously reselects to the target neighboring cell if the conditions are met. It is worth noting that since the near-far effect is not obvious in NTN (that is, the distance between the UE and different satellites has no obvious impact on the signal quality), the switching / reselection triggered solely by signal quality is inefficient. Therefore, NR / NTN considers location-assisted switching / reselection enhancement technologies, such as time / timer-based, UE location information (for example, the distance between the UE and the reference point of the source cell is greater than the preset threshold, and the distance to the reference point of the target cell is less than the preset threshold), the combination of UE location information and timer, the combination of UE location information and signal quality, etc., to achieve mobility management in NTN scenarios.

[0132] Existing NR and NTN handover / reselection solutions are typically triggered primarily by UE mobility. In NTN networks (especially LEO scenarios), group handovers triggered primarily by network (e.g., satellite) mobility are the norm. However, group handovers / reselections triggered primarily by network mobility require a large amount of information exchange, resulting in high signaling overhead.

[0133] In order to facilitate understanding of the embodiments of the present application, the following explanations are made.

[0134] First, in the various embodiments of the present application, unless otherwise specified or provided for, the terms and / or descriptions between the different embodiments are consistent and can be referenced by each other. The technical features in the different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0135] Second, the first, second, and various numerical numbers (e.g., "#1," "#2," etc.) shown in this application are merely for convenience of description and are used to distinguish between objects. They are not intended to limit the scope of the embodiments of this application. For example, they are used to distinguish between different terminal devices, etc. They are not intended to describe a specific order or precedence. It should be understood that the objects described in this manner can be interchanged where appropriate to describe solutions other than the embodiments of this application.

[0136] Third, in the embodiments of the present application, "of", "corresponding, relevant", "corresponding" and "associate" can sometimes be used interchangeably. It should be pointed out that when the distinction between them is not emphasized, the meanings they intend to express are consistent.

[0137] Fig. 5 is a schematic flow chart of a communication method 500 provided by the present application. The method may include the following steps.

[0138] S510: A first node sends first information and second information to a first terminal device. Correspondingly, the first terminal device receives the first information and second information from the first node.

[0139] The first information may include public information for performing mobility management on at least one terminal device within at least one area corresponding to the second node, and the first information may also be referred to as public part information. The second information may include dedicated information for performing mobility management on the first terminal device, and the second information may also be referred to as dedicated part information. The at least one area includes an area served by the first node.

[0140] The first terminal device can be any terminal device within the service range of the first node. It is understood that the first terminal device is also within the service range of the second node, or in other words, the at least one terminal device includes the first terminal device. Optionally, the service range of the second node may also include other terminal devices.

[0141] Exemplarily, the mobility management includes cell handover or cell reselection.

[0142] That is, the public part information is for the terminal devices to be switched and / or reselected within the at least one area. In the scenario of cell switching / cell reselection mainly triggered by network mobility, the terminal devices to be switched and / or reselected within the one or more areas are generally groups of terminal devices, hereinafter referred to as terminal device groups or UE groups, etc. In other words, the public part information may include public information of the terminal device groups to be switched and / or reselected within the at least one area; the dedicated part information may include dedicated information of each terminal device in the terminal device groups to be switched and / or reselected within the at least one area.

[0143] Exemplarily, the first information may include at least one of the following information:

[0144] The interface (F1) between the second node and at least one node includes an identification ID(s) of an application protocol (AP), a common measurement configuration (Common-MeasConfig), a common cell group configuration (CellGroupConfig), a common radio bearer configuration (Common-RadioBearerConfig), and a common synchronization reconfiguration (Common-ReconfigurationWithSync). The at least one node includes the first node.

[0145] Among them, the public measurement configuration may include the periodicity and length (duration) of the synchronization signal and physical broadcast channel (PBCH) block (SSB) measurement timing configuration (SMTC), for example, the maximum period of SMTC is 160ms. The public measurement configuration may also include information such as the reference position of the second node and the measurement priority of at least one area corresponding to the second node; the public cell group configuration may be used to configure the primary cell group or the secondary cell group; the public radio bearer configuration may be used to configure the public signaling radio bearer (SRB) (such as SRB0, SRB1 and SRB2, etc.) and data bearer configuration; the public synchronization reconfiguration may include the time domain configuration of the access opportunity (RACH occasion, RO) corresponding to the switching, for example, the physical random access channel (physical random access channel, PRACH) configuration index (prach-configurationIndex), preamble, msg1-FDM factor in the frequency domain (used to indicate the number of ROs configured in the frequency domain, that is, the number of ROs included in the same time domain resource), the public validity period or timer of the F1-AP, etc.

[0146] The second information may include at least one of the following information:

[0147] The dedicated measurement configuration (Dedicated-MeasConfig) of the first terminal device, the dedicated cell group configuration (Dedicated-CellGroupConfig) of the first terminal device, the dedicated radio bearer configuration (RadioBearerConfig) of the first terminal device, and the dedicated synchronization reconfiguration (Dedicated-ReconfigurationWithSync) of the first terminal device.

[0148] Exemplarily, Dedicated-MeasConfig is used to configure multiple SMTCs and SMTC periodic extension factors. Dedicated-MeasConfig may include SMTC-offset to solve the problem of time delay difference in measurements between different satellites / cells. Dedicated-MeasConfig may also include ephemeris information of different adjacent satellites at different times; Dedicated-ReconfigurationWithSync may include the extension factors of multiple ROs and the number of RO consecutive frames to adapt to the non-uniform access requirements of different cells or wave positions, and the offset of the common validity period of the F1-AP; Common-RadioBearerConfig may be used to configure dedicated signaling bearers (such as SRB2 and SRB3 dedicated to the first terminal device, etc.).

[0149] In one possible implementation, the first information may be determined by the second node; the second information may be determined by the first node, and the second information is related to the area where the first terminal device is currently located (the serving cell of the terminal device, or the cell or waveband in which the terminal device is currently located). For example, the second information of the terminal device may be different for cells with different frequencies. "Determine" may be replaced by "generate."

[0150] The first node described above may be a node in an NTN communication scenario, and may be used to carry some or all of the gNB-DU functionality. The second node may be a node or a ground station in an NTN communication scenario, and may be used to carry some or all of the gNB-CU functionality. Taking a satellite communication scenario as an example, the first node may be a first satellite, and the second node may be a second satellite or a ground station corresponding to the first satellite.

[0151] In one possible scenario, the second node corresponds to at least one geographic area, or in other words, different geographic areas can be identified by the second node it serves; the second node corresponds to at least one node. Exemplarily, the second node corresponding to at least one node can be understood as: the geographic area corresponding to the second node can be served by at least one node, or in other words, the geographic area includes at least one area (e.g., cell or wave) corresponding to each of the at least one node.

[0152] FIG6 is a schematic diagram showing the service range of a first node and a second node.

[0153] As shown in Figure 6, the second node includes gNB-CU#1 and gNB-CU#2, where the geographical area served by gNB-CU#1 (e.g., GeographicalAreaSet#1) includes at least one waveband (e.g., wavebands bw#1 to bw#12), and the at least one waveband is served by satellite #1 (an example of the at least one node corresponding to the second node); the geographical area served by gNB-CU#2 (e.g., GeographicalAreaSet#2) includes at least one waveband (e.g., wavebands bw#13 to bw#25) which can be served by satellite #2 and satellite #3 (an example of the at least one node corresponding to the second node).

[0154] S520: The first terminal device executes a mobility management process within the area served by the first node based on the first information and the second information.

[0155] Exemplarily, when the first node or the first terminal device moves, the mobility process of the first terminal device in the area served by the first node may be triggered. The first terminal device measures the candidate area based on the first information and the second information to obtain a measurement report. The candidate area may be the area served by the first node, and the measurement report may be used to characterize the signal quality of the candidate area; the first terminal device sends the measurement report to the first node so that the first section determines to execute the mobility management process. The specific process of the first terminal device and the first node executing the mobility process can be referred to the description in Figure 9.

[0156] S530: The first node sends the updated second information to the first terminal device.

[0157] The updated second information corresponds to the area where the terminal device is located after switching.

[0158] Taking the second information including Dedicated-ReconfigurationWithSync as an example, the expansion factors and the number of RO consecutive frames included in the Dedicated-ReconfigurationWithSync corresponding to the area where the terminal device is located after switching may be different from the expansion factors and the number of RO consecutive frames included in the Dedicated-ReconfigurationWithSync corresponding to the area where the terminal device is located before switching.

[0159] That is, when the first terminal device moves from one area served by the first node to another area through the mobility management process, the first node can only send the updated second information to the first terminal device, or in other words, the first node can send the updated second information to the first terminal device without sending the first information, thereby saving signaling overhead in the mobility management process.

[0160] It should be understood that the above describes the solution of the present application by taking the mobility management process including cell switching as an example. The mobility management process mentioned in the embodiments of the present application may also be cell reselection, without limitation.

[0161] Based on the above scheme, by dividing the information of the terminal device to be switched and / or reselected into public part information and dedicated part information, and in the mobility management process of the terminal device switching / reselecting from one area of ​​a node to another area, only updating the dedicated part information of the terminal device, the signaling overhead in the mobility management process of the terminal device can be reduced.

[0162] Optionally, the method further includes:

[0163] S501: A second node sends the first information to a first node. Correspondingly, the first node receives the first information from the second node.

[0164] Exemplarily, in the initial access process of the first terminal device, the second node sends the first information to the first node. The initial access process can be specifically described in reference to FIG8 .

[0165] Figure 7 is a schematic flowchart of a communication method 700 provided herein. This method can be applied to a process in which a terminal device performs cell handover or cell reselection between different nodes (e.g., satellite #2 and satellite #3 in Figure 6 ) corresponding to a second node (e.g., gNB-CU #2 in Figure 6 ). The term "different nodes corresponding to the second node" can be understood as meaning that the geographic area served by the second node includes the area served by the different node. This method can include the following steps.

[0166] S710: A first node sends first information and second information to a first terminal device. Correspondingly, the first terminal device receives the first information and second information from the first node.

[0167] The first node, the second node, the first terminal device, the first information, and the second information may refer to the description in S510.

[0168] S720: The first terminal device performs a mobility management process from the area served by the first node to the first area based on the first information and the second information.

[0169] The first area is an area served by a third node. The third node may be one of at least one node corresponding to the second node. Exemplarily, the third node is a third satellite.

[0170] Exemplarily, when the first node or the first terminal device moves, a mobility process of the first terminal device from the area served by the first node to the first area may be triggered. The first terminal device measures the candidate area based on the first information and the second information to obtain a measurement report. The candidate area may include the area served by the first node and the first area. The measurement report can be used to characterize the signal quality of the candidate area; the first terminal device sends the measurement report to the first node so that the first section determines to execute the mobility management process. The specific process of the first terminal device, the first node and the third node executing the mobility process can be referred to the description in Figure 10.

[0171] S730: The third node sends third information to the first terminal device. Correspondingly, the first terminal device receives the third information from the third node.

[0172] The third information includes dedicated information for performing mobility management on the first terminal device, corresponds to the first area, and can be determined by the third node.

[0173] Exemplarily, the third information may include a dedicated measurement configuration (Dedicated-MeasConfig) of the first terminal device, a dedicated cell group configuration (Dedicated-CellGroupConfig) of the first terminal device, a dedicated radio bearer configuration (RadioBearerConfig) of the first terminal device, and a dedicated synchronous reconfiguration (Dedicated-ReconfigurationWithSync) of the first terminal device.

[0174] Taking the third information including Dedicated-MeasConfig as an example, the correspondence between the third information and the third node can be understood as: the SMTC period extension factor included in the Dedicated-MeasConfigSMTC corresponding to the third node can be different from the SMTC period extension factor included in the Dedicated-MeasConfigSMTC corresponding to the first node.

[0175] For example, if the serving cell of the terminal device is the cell (e.g., cell#1) of satellite#1 (an example of the first node), the Dedicated-MeasConfig for cell#1 may include the ephemeris information of satellite#1. If the terminal device switches from cell#1 to cell#2 (the cell of satellite#2), the Dedicated-MeasConfig for cell#2 may include the ephemeris information of satellite#2 (an example of the third node). Accordingly, the SMTC-offset corresponding to the cell is also different, such as SMTC-offset-1 of cell#1 is 1ms, and SMTC-offset-2 of celll#2 is 1.2ms.

[0176] That is, when executing the mobility management process of the first terminal device from the area served by the first node to the first area (an example of at least one area served by the third node), the third node can only send the dedicated part information of the first terminal device to the first terminal device, or in other words, the third node can send the dedicated part information of the first terminal device to the first terminal device without sending the public part information.

[0177] In addition, the public part information and dedicated part information of different networks can be configured in a differential manner. Specifically, a reference public part information (denoted as Reference RRC-P1) and / or reference dedicated part information (denoted as Reference RRC-P2) can be configured for the terminal device, as well as one or more differential configurations relative to the reference part information, for example, the differential configuration corresponding to the reference public part information is denoted as delta RRC-P1, and the differential configuration corresponding to the reference dedicated part information is denoted as delta RRC-P2. When a network device (e.g., a first node or a third node) needs to configure public part information or dedicated part information for a terminal device (e.g., a first terminal device), different Reference RRCs and / or delta RRCs can be indicated.

[0178] Based on the above scheme, by dividing the information of the terminal device to be switched and / or reselected into public part information and dedicated part information, and in the mobility management process from one node to another of the terminal device, only updating the dedicated part information of the terminal device, the signaling overhead in the mobility management process of the terminal device can be reduced.

[0179] Optionally, the method further includes:

[0180] S701: A second node sends the first information to a first node. Correspondingly, the first node receives the first information from the second node.

[0181] For details, please refer to the description in S501.

[0182] FIG8 is a method for initial access provided by the present application, which may include the following steps.

[0183] In step S801, the UE sends an RRC Setup Request message to gNB-DU #1. In response, the gNB-DU receives the RRC Setup Request message from the UE.

[0184] The RRC setup request message includes the location information of the UE.

[0185] For example, the UE's location information can be determined through its own global navigation satellite system (GNSS) information, or the UE's location information includes information about the UE's geographical location, such as the UE's beam information, beam identification information, wave position information, wave position related identification information, or longitude and latitude information.

[0186] In step S802, gNB-DU#1 sends information #1 to the gNB-CU. In response, the gNB-CU receives information #1 from gNB-DU#1.

[0187] This information #1 includes RRC-P1 information of the UE (an example of the second information).

[0188] Optionally, the RRC-P1 message includes a dedicated ID for the UE within the gNB-CU service area. The dedicated ID may include geographic location information. The dedicated ID is unique within the gNB-CU service area.

[0189] Optionally, the information #1 further includes bottom layer configuration information, where the bottom layer configuration information includes configuration information of the physical layer and / or the medium access control (MAC) layer.

[0190] For example, gNB-DU#1 sends information#1 to gNB-CU via the INITIAL UL RRC MESSAGE TRANSFER message.

[0191] In step S803, the gNB-CU sends information #2 to gNB-DU #1. In response, gNB-DU #1 receives information #2 from the gNB-CU.

[0192] Information #2 may include the UE's RRC-P2 information (an example of the first information). Optionally, Information #2 may include information related to the F1-AP ID and at least one of the interface information between the gNB-CU and gNB-DU #1.

[0193] The F1-AP ID-related information may include information related to the F1-AP ID validity period / timer, or the F1-AP ID update mechanism triggered by the location change of gNB-DU#1.

[0194] For example, the gNB-CU sends information #2 to the gNB-CU via a DL RRC MESSAGE TRANSFER message.

[0195] In step S804, gNB-DU#1 sends an RRC Setup message to the UE. In response, the UE receives the RRC Setup message from gNB-DU#1.

[0196] Exemplarily, the RRCSetup information may include the dedicated part information and the public part information of the UE included in the information #1 and the information #2.

[0197] At S805, the UE sends an RRC Setup Complete message to gNB-DU#1. In response, gNB-DU#1 receives the RRC Setup Complete message from the UE.

[0198] For example, after the RRC connection establishment is completed, the UE sends an RRC connection establishment complete message to gNB-DU#1.

[0199] At S806, gNB-DU#1 sends an UL RRC MESSAGE TRANSFER message to the gNB-CU. In response, the gNB-CU receives the UL RRC MESSAGE TRANSFER message from gNB-DU#1.

[0200] The UL RRC MESSAGE TRANSFER message may include an RRC connection establishment complete message.

[0201] S807: The gNB-CU sends an INITIAL UE MESSAGE message to the AMF. In response, the AMF receives the INITIAL UE MESSAGE message from the gNB-CU.

[0202] The INITIAL UE MESSAGE may carry the UE's location information.

[0203] S808: The AMF sends an Initial UE Context Setup Request message to the gNB-CU. In response, the gNB-CU receives the Initial UE Context Setup Request message from the AMF.

[0204] S809: The gNB-CU sends a UE CONTEXT SETUP REQUEST message to gNB-DU#1. In response, gNB-DU#1 receives the UE CONTEXT SETUP REQUEST message from the gNB-CU.

[0205] The UE context establishment request message may be used to request the establishment of SRB and DRB bearers.

[0206] S810: gNB-DU#1 sends a SecurityModeCommand message to the UE.

[0207] The SecurityModeCommand message may carry security algorithm configuration (securityAlgorithmConfig).

[0208] S811: gNB-DU#1 sends a UE CONTEXT SETUP RESPONSE message to the gNB-CU.

[0209] S812: The UE sends a SecurityModeComplete message to gNB-DU#1.

[0210] The SecurityModeComplete message is used to confirm the completion of the security mode command.

[0211] S813: gNB-DU#1 sends an UL RRC MESSAGE TRANSFER message to the gNB-CU.

[0212] gNB-DU#1 can carry the SecurityModeComplete message to the gNB-CU via the UL RRC MESSAGE TRANSFER message.

[0213] The UL RRC MESSAGE TRANSFER message may also include RRC-P1 of the UE (an example of the second information).

[0214] S814: The gNB-CU sends a DL RRC MESSAGE TRANSFER message to gNB-DU#1.

[0215] The DL RRC MESSAGE TRANSFER message includes an RRC reconfiguration message, which includes RRC-P2 (an example of the first information). RRC-P2 may include public measurement configuration, public cell group configuration, public radio bearer configuration, and public synchronization reconfiguration within the group / or geographical area where the UE is located.

[0216] For example, after receiving RRC-P1 from gNB-DU#1, the gNB-CU sends RRC-P2 to gNB-DU#1 via the DL RRC MESSAGE TRANSFER message.

[0217] S815: gNB-DU#1 sends the RRCReconfiguration message to the UE.

[0218] The RRCReconfiguration message may include RRC-P1 and RRC-P2.

[0219] S816: The UE sends an RRC Reconfiguration Complete message to gNB-DU#1.

[0220] At S817, gNB-DU#1 sends an UL RRC MESSAGE TRANSFER message to the gNB-CU. In response, the gNB-CU receives the UL RRC MESSAGE TRANSFER message from gNB-DU#1.

[0221] For example, gNB-DU#1 encapsulates the RRC message in a UL RRC MESSAGE TRANSFER and sends it to the gNB-CU. The RRC message may be an RRCReconfigurationComplete message.

[0222] S818: The gNB-CU sends an INITIAL CONTEXT SETUP RESPONSE message to the AMF. In response, the AMF receives the INITIAL CONTEXT SETUP RESPONSE message from the gNB-CU.

[0223] Based on the above initial process scheme, gNB-DU#1 (an example of the first node) can receive the first information from the gNB-CU (an example of the second node); thereby, gNB-DU#1 sends the first information and the second information to the UE (an example of the first terminal device).

[0224] The following, in conjunction with Figures 9 and 10, describes in detail the communication methods 500 and 700 provided in this application, taking the switching of a terminal device between different areas or different nodes of the same node as an example. It can be understood that the embodiments shown in Figures 9 and 10 are based on the embodiments shown in Figures 5 and 7, respectively. The description of the communication method provided in this application can be cross-referenced between the embodiments, and the content described in the embodiments shown in Figures 5 and 7 will not be repeated. In addition, the embodiments shown in Figures 9 and 10 are described with the UE as the first terminal device, gNB-DU#1 as the first node, gNB-CU as the second node, and gNB-DU#3 as the third node.

[0225] FIG9 is a schematic flow chart of a communication method 900 provided by the present application. The method may include the following steps.

[0226] S901: The gNB-CU sends RRC-P2 information (an example of first information) to the UE. Accordingly, the UE receives the RRC-P2 information from the gNB-CU.

[0227] Exemplarily, the gNB-CU sends RRC-P2 information to the UE via an RRC Reconfiguration message. Specifically, the RRC-P2 information may be carried in the RRC Reconfiguration message. The RRC-P2 information may include public measurement configuration information.

[0228] The measurement configuration information includes information required to measure the candidate cell, for example, the measurement configuration information may include measurement objects and measurement reporting configurations. Optionally, the measurement configuration information may also include measurement identities, quantity configurations, measurement gaps, and other information.

[0229] The measurement target is used to identify the candidate cells that the UE needs to measure, i.e., the cells to be measured. The cells to be measured are also called target cells. The measurement target may include the identifiers of one or more candidate cells. For example, if the measurement target includes the identifiers of Cell 1 and Cell 2, it means that the UE's measurement targets are Cell 1 and Cell 2, or that the UE needs to measure the signal strength of Cell 1 and Cell 2.

[0230] The measurement report configuration information may include a reporting criterion. That is, when the measurement result of a candidate cell meets the reporting criterion, the UE may report the measurement report of the candidate cell. For example, the reporting criterion may be that the signal strength of the candidate cell is greater than or equal to a threshold value.

[0231] Optionally, the measurement report configuration information may further include measurement parameter information, where the measurement parameter information is used to indicate the measurement results of which parameters need to be included in the measurement report.

[0232] The measurement identifier can be used to associate a measurement object with a measurement report configuration information. By configuring multiple measurement identifiers, multiple measurement objects can be associated with one measurement report configuration, or multiple measurement report configurations can be associated with one measurement object.

[0233] The quantity configuration may indicate the number of cells that the UE includes in the measurement report. For example, the quantity configuration indicates that the UE includes measurement results of two cells in the measurement report. In this case, the UE may include measurement results of the two candidate cells with the highest signal strength in the measurement report.

[0234] The measurement gap may indicate a period for the UE to perform measurements. For example, if the measurement gap indicates that the period for the UE to perform measurements is 30 seconds, the UE measures the signal of the candidate cell once every 30 seconds.

[0235] S902: The UE sends an RRC Reconfiguration Complete message to the gNB-CU.

[0236] For example, the UE receives an RRC reconfiguration message from the gNB-CU and, after completing the RRC reconfiguration, sends an RRC reconfiguration complete message to the gNB-CU.

[0237] S903, the UE sends a neighboring cell measurement report to gNodeB-DU#1.

[0238] Exemplarily, the UE measures the candidate cell according to the measurement configuration information in S901 and sends a measurement report of the target cell to the gNodeB-DU according to the measurement report configuration information. The measurement report may carry the PCI of the target cell.

[0239] gNodeB-DU#1 is the gNodeB-DU serving the UE. In other words, the UE is located in a cell served by gNodeB-DU#1. The UE sends a Neighbor Measurement Report to gNodeB-DU#1; this part of the message does not need to be transmitted to the gNB-CU.

[0240] S904, gNodeB-DU#1 determines whether to perform cell handover for the UE.

[0241] Exemplarily, after receiving the measurement report from the UE, gNodeB-DU#1 decides whether to perform cell handover for the UE based on the measurement report.

[0242] For example, gNodeB-DU#1 receives a measurement report from a UE for Cell 1 (an example of a target cell). The measurement report includes the signal strength measurement result of Cell 1. gNodeB-DU#1 determines whether the measurement result of Cell 1 meets a handover condition. The handover condition is a condition used to determine whether the UE can be handed over from the serving cell to a candidate cell. The handover condition may be, for example, that the signal strength of the candidate cell is greater than a set threshold. If the measurement result of Cell 1 meets the handover condition, gNodeB-DU#1 may decide to perform a cell handover for the UE, either handing the UE over to Cell 1 or switching the UE's serving cell to Cell 1.

[0243] If gNodeB-DU#1 decides to perform a cell handover for the UE based on the measurement report, gNodeB-DU#1 determines whether the target cell and the serving cell belong to the same gNodeB-DU based on the PCI of the target cell carried in the measurement report. If they do, the intra-site handover process is initiated; if not, the inter-site handover process is initiated.

[0244] S905 , gNodeB-DU#1 sends the cell handover decision result to gNodeB-CU.

[0245] Exemplarily, the cell switching decision result may be switching from one cell served by gNodeB-DU#1 (serving cell) to another cell (target cell).

[0246] S906: gNodeB-CU sends a UE CONTEXT SETUP REQUEST message to gNodeB-DU#1. Correspondingly, gNodeB-DU receives the UE CONTEXT SETUP REQUEST message from gNodeB-CU.

[0247] The UE CONTEXT SETUP REQUEST message is used to apply for user resources for the target cell.

[0248] S907: gNodeB-DU#1 sends a UE CONTEXT SETUP RESPONSE message to gNodeB-CU. In response, gNodeB-CU receives the UE CONTEXT SETUP RESPONSE message from gNodeB-DU#1.

[0249] Exemplarily, after successful resource allocation, gNodeB-DU#1 sends a UE CONTEXT SETUP RESPONSE message to gNodeB-CU.

[0250] S908: gNodeB-CU sends a UE CONTEXT MODIFICATION REQUEST message to gNodeB-DU#1. In response, gNodeB-DU#1 receives the UE CONTEXT MODIFICATION REQUEST message from gNodeB-CU.

[0251] The UE CONTEXT MODIFICATION REQUEST is used to instruct the gNodeB-DU to stop scheduling layer 2 (L2) of the source cell (serving cell).

[0252] S909: gNodeB-DU#1 sends a UE CONTEXT MODIFICATION RESPONSE message to gNodeB-CU. Correspondingly, gNodeB-CU receives the UE CONTEXT MODIFICATION RESPONSE message sent by gNodeB-DU#1.

[0253] S910, gNodeB-CU sends RRC-P1 information (an example of second information) to the UE.

[0254] Exemplarily, the gNodeB-CU sends RRC-P1 information to the UE through an RRCReconfiguration message.

[0255] Optionally, RRCReconfiguration also includes a target frequency for switching, a PCI, a cell radio network temporary identify (CRNTI) configured for the UE, and a dedicated preamble.

[0256] S911, the UE initiates a non-contention random access MSG1 message in the target cell.

[0257] For example, the MSG1 carries a dedicated preamble.

[0258] S912, gNodeB-DU#1 sends a MSG2 message to the UE.

[0259] S913, the UE sends an RRC reconfiguration complete (RRCReconfigurationComplete) message to the gNodeB-CU.

[0260] Exemplarily, RRCReconfigurationComplete is used to notify the UE to access the target cell.

[0261] S914, gNodeB-CU sends a UE CONTEXT RELEASE COMMAND message to gNodeB-DU#1.

[0262] Exemplarily, after receiving the message, gNodeB-DU#1 releases the UE in the source cell.

[0263] S915: After switching to the target cell, gNodeB-DU#1 sends an updated RRC-P1 message to the UE via RRCReconfiguration.

[0264] Exemplarily, the updated RRC-P1 may include measurement configuration information of the target cell. For details, please refer to the description in S510.

[0265] FIG10 is a schematic flow chart of a communication method 1000 provided by the present application. The method may include the following steps.

[0266] S1001: The gNB-CU sends RRC-P2 information (an example of the first information) to the UE. In response, the UE receives RRC-P1 from the gNB-CU.

[0267] For example, the gNB-CU sends the RRC-P1 to the UE through gNB-CU#1. The RR-P1 may refer to the description in S901.

[0268] At S1002, gNB-DU#1 sends RRC-P1 information (an example of the second information) to the UE. In response, the UE receives the RRC-P1 information from gNB-DU#1.

[0269] RRC-P1 may include measurement configuration information. The measurement configuration information may include one or more of the following information: measurement configuration related to broadcast signal (based on SSB) measurement, such as SMTC period, SMTC duration, SMTC offset of the serving cell and neighboring cell, measurement priority, location and distance threshold of reference points of the serving cell and neighboring cell, service time, and other information.

[0270] S1003: The UE sends a neighbor cell measurement report to gNB-DU#1. In response, gNB-DU#1 receives the neighbor cell measurement report from the UE.

[0271] For this step, please refer to the description of S903.

[0272] In step S1004, gNB-DU#1 sends a handover request to gNB-DU#2. In response, gNB-DU#2 receives the handover request from gNB-DU#1.

[0273] For example, when gNB-DU#1 determines that the UE meets the handover conditions based on the neighboring cell measurement report, and the target cell for handover is the cell served by gNB-DU#2, gNB-DU#1 sends the handover request to gNB-DU#2.

[0274] In step S1005, gNB-DU#2 sends a Handover Request Acknowledge message to gNB-DU#1. In response, gNB-DU#1 receives the Handover Request Acknowledge message from gNB-DU#2.

[0275] At S1006, gNB-DU#1 sends RRC-P1 information to the UE. In response, the UE receives the RRC-P1 information from gNB-DU#1.

[0276] The RRC-P1 information may indicate subsequent handover related resources and a conditional handover (CHO) triggering condition, such as satellite signal quality being greater than or equal to a preset threshold.

[0277] In S1007, gNB-DU#1 and gNB-DU#2 exchange UE context information.

[0278] For example, gNB-DU#1 and gNB-DU#2 exchange UE context information via an inter-satellite link (ISL).

[0279] S1008: The UE initiates a random access request to gNB-DU#2. In response, gNB-DU#2 receives the random access request from the UE.

[0280] S1009: gNB-DU#2 sends a random access response message to the UE. Accordingly, the UE receives the random access response message from gNB-DU#2.

[0281] S1010: gNB-DU#2 sends a path switch request message to the gNB-CU. The gNB-CU receives the path switch request message from gNB-DU#2.

[0282] Exemplarily, the path switch request message is used to request switching of a user plane path of the UE.

[0283] S1011: The gNB-CU returns a Path Switch Request Response message to gNB-DU#2. gNB-DU#2 receives the Path Switch Request Response message from the gNB-CU.

[0284] At step S1012, gNB-DU#2 sends an indication to gNB-DU#1, indicating that the UE context information should be released. In response, gNB-DU#1 receives the indication from gNB-DU#2.

[0285] In step S1013, gNB-DU#2 sends RRC-P1 information (an example of the third information) to the UE. In response, the UE receives the RRC-P1 information from gNB-DU#2.

[0286] For the third information, reference may be made to the description in S720 .

[0287] At step S1014, the UE returns an RRC-P1 configuration success acknowledgment to gNB-DU#2. In response, gNB-DU#2 receives the RRC-P1 configuration success acknowledgment from the UE.

[0288] The above describes in detail the method of the embodiment of the present application in combination with Figures 5 to 10, and the following describes in detail the device of the embodiment of the present application in combination with Figures 11 to 13. It should be noted that the device shown in Figures 11 to 13 can implement each step in the above method. For the sake of brevity, they will not be repeated here.

[0289] FIG11 is a schematic block diagram of a communication device 1000 according to an embodiment of the present application. As shown in FIG11 , the communication device 1000 may include a transceiver unit 1010 and a processing unit 1020 .

[0290] In one possible design, the communication device 1000 may be the first node in the above method embodiment, or may be a chip for implementing the function of the first node in the above method embodiment.

[0291] It should be understood that the communications device 1000 may correspond to the first node in method 500 or method 700 of the embodiments of the present application, or to gNB-DU#1 in methods 800 to 1000 of the embodiments of the present application. The communications device 1000 may include a unit for executing the method performed by the first node in method 500 or method 700, or a unit for executing the method performed by gNB-DU#1 in method 900 or method 1000. Furthermore, the various units in the communications device 1000 and the other operations and / or functions described above are respectively intended to implement the corresponding processes of methods 500 to 1000. It should be understood that the specific process of each unit executing the corresponding steps described above has been described in detail in the above-mentioned method embodiments and, for the sake of brevity, will not be repeated here.

[0292] In another possible design, the communication device 1000 may be the second node in the above method embodiment, or may be a chip for implementing the function of the first node in the above method embodiment.

[0293] It should be understood that the communications apparatus 1000 may correspond to the second node in method 500 or method 700 in the embodiments of the present application, or to the gNB-CU in methods 800 to 1000 in the embodiments of the present application. The communications apparatus 1000 may include a unit for executing the method performed by the second node in method 500 or method 700, or a unit for executing the method performed by the gNB-CU in method 900 or method 1000. Furthermore, the various units in the communications apparatus 1000 and the other operations and / or functions described above are for implementing the corresponding processes of methods 500 to 1000. It should be understood that the specific process of each unit executing the corresponding steps described above has been described in detail in the aforementioned method embodiments and, for the sake of brevity, will not be repeated here.

[0294] In another possible design, the communication device 1000 may be the third node in the above method embodiment, or may be a chip for implementing the function of the third node in the above method embodiment.

[0295] It should be understood that the communications device 1000 may correspond to the first node in method 500 or method 700 of the embodiments of the present application, or to gNB-DU#2 in methods 800 through 1000 of the embodiments of the present application. The communications device 1000 may include a unit for executing the method performed by the first node in method 500 or method 700, or a unit for executing the method performed by gNB-DU#2 in method 900 or method 1000. Furthermore, the various units in the communications device 1000 and the other operations and / or functions described above are for implementing the corresponding processes of methods 500 through 1000. It should be understood that the specific process of each unit executing the corresponding steps described above has been described in detail in the aforementioned method embodiments and, for the sake of brevity, will not be repeated here.

[0296] In another possible design, the communication device 1000 can be the first terminal device in the above method embodiment, or it can be a chip used to implement the function of the first device in the above method embodiment.

[0297] It should be understood that the communication device 1000 may correspond to the first terminal device in method 500 or method 700 of the embodiment of the present application, or correspond to the UE in methods 800 to 1000 of the embodiment of the present application. The communication device 1000 may include a unit for executing the method performed by the first terminal device in method 500 or method 700, or include a unit for the method performed by the UE in method 900 or method 1000. In addition, each unit in the communication device 1000 and the above-mentioned other operations and / or functions are respectively for implementing the corresponding processes of methods 500 to 1000. It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above-mentioned method embodiments and will not be repeated here for the sake of brevity.

[0298] It should also be understood that the transceiver unit 1010 in the communication device 1000 may correspond to the transceiver 2020 in the communication equipment 2000 shown in FIG. 12 , and the processing unit 1020 in the communication device 1000 may correspond to the processor 2010 in the communication equipment 2000 shown in FIG. 12 .

[0299] It should also be understood that when the communication device 1000 is a chip, the chip includes a transceiver unit. Optionally, the chip may also include a processing unit. The transceiver unit may be an input / output circuit or a communication interface; the processing unit may be a processor, microprocessor, or integrated circuit integrated on the chip.

[0300] The transceiver unit 1010 is used to implement the signal transceiver operation of the communication device 1000, and the processing unit 1020 is used to implement the signal processing operation of the communication device 1000.

[0301] Optionally, the communication device further includes a storage unit 1030, and the storage unit 1030 is used to store instructions.

[0302] Figure 12 is a schematic block diagram of a communication device 2000 provided in an embodiment of the present application. As shown in Figure 12, the communication device 2000 includes at least one processor 2010 and a transceiver 2020. The processor 2010 is coupled to a memory and is configured to execute instructions stored in the memory to control the transceiver 2020 to transmit and / or receive signals. Optionally, the communication device 2000 also includes a memory 2030 for storing instructions.

[0303] It should be understood that the processor 2010 and memory 2030 may be combined into a processing device, and the processor 2010 is used to execute the program code stored in the memory 2030 to implement the above functions. In specific implementations, the memory 2030 may also be integrated into the processor 2010 or independent of the processor 2010.

[0304] It should also be understood that the transceiver 2020 may include a receiver (or receiver) and a transmitter (or transmitter). The transceiver 2020 may further include an antenna, which may be one or more. The transceiver 2020 may also be an antenna interface or interface circuit.

[0305] When the communication device 2000 is a chip, the chip includes a transceiver unit and a processing unit. The transceiver unit may be an input / output circuit or a communication interface; the processing unit may be a processor, microprocessor, or integrated circuit integrated on the chip.

[0306] FIG13 is a schematic diagram of a chip system according to an embodiment of the present application. The chip system herein may also be a system composed of circuits. The chip system 3000 shown in FIG13 includes: a logic circuit 3010 and an input / output interface 3020. The logic circuit is configured to couple with the input interface and transmit data through the input / output interface to execute the methods described in FIG5, FIG7, FIG8, FIG9, or FIG10.

[0307] The present application also provides a processing device, including a processor and an interface. The processor can be used to execute the method in the above method embodiment.

[0308] It should be understood that the processing device may be a chip. For example, the processing device may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD), or other integrated chips.

[0309] During implementation, each step of the above method can be completed by an integrated logic circuit of the hardware in the processor or an instruction in the form of software. The steps of the method disclosed in conjunction with the embodiments of the present application can be performed by a hardware processor, or by a combination of hardware and software modules in the processor. The software module can be located in a storage medium mature in the art such as a random access register, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in conjunction with its hardware. To avoid repetition, it will not be described in detail here.

[0310] It should be noted that the processor in the embodiment of the present application can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by an integrated logic circuit of the hardware in the processor or an instruction in the form of software. The above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. The disclosed methods, steps and logic block diagrams in the embodiment of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.

[0311] It is understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache.

[0312] According to the method provided in the embodiments of the present application, the present application also provides a computer program product, which includes: computer program code, which, when running on a computer, enables the computer to execute the method described in Figure 5, Figure 7, Figure 8, Figure 9 or Figure 10.

[0313] According to the method provided in the embodiments of the present application, the present application also provides a computer-readable storage medium, which stores program code. When the program code runs on a computer, the computer executes the method described in Figures 5, 7, 8, 9 or 10.

[0314] According to the method provided in the embodiment of the present application, the present application also provides a system, which includes the aforementioned access network device and the first device. Optionally, the system also includes a fusion management function network element and / or a target network computing power fusion function node.

[0315] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a high-density digital video disc (DVD)), or a semiconductor medium (e.g., a solid-state drive (SSD)).

[0316] In the several embodiments mentioned in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0317] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: include: The first terminal device receives first information and second information from the first node, the first information including public information for performing mobility management on at least one terminal device in at least one area corresponding to the second node, the second information including dedicated information for performing mobility management on the first terminal device, the at least one area including an area served by the first node, and the at least one terminal device including the first terminal device; The first terminal device performs a mobility management process within an area served by the first node based on the first information and the second information; The first terminal device receives the updated second information from the first node.

2. The method according to claim 1, characterized in that: The first node is a first satellite, and the second node is a second satellite or a ground station corresponding to the first satellite.

3. The method according to claim 1 or 2, characterized in that: The first information includes at least one of the following information: The interface F1 between the first node and at least one node applies the identification of the protocol AP, the common measurement configuration, the common cell group configuration, the common radio bearer configuration, and the common synchronization reconfiguration; wherein the at least one node includes the first node; And, the second information includes at least one of the following information: A dedicated measurement configuration of the first terminal device, a dedicated cell group configuration of the first terminal device, a dedicated radio bearer configuration of the first terminal device, and a dedicated synchronization reconfiguration of the first terminal device.

4. The method according to claim 3, characterized in that The public measurement configuration includes at least one of the following information: A measurement timing configuration SMTC based on a synchronization signal block, location information of the second node, and a measurement priority of the at least one area; And, the common synchronous reconfiguration includes at least one of the following information: The time domain configuration, preamble or frequency domain configuration of the access opportunity RO corresponding to the access target area in the mobility management process, and the validity period of the F1AP.

5. The method according to claim 3, characterized in that: The dedicated measurement configuration includes at least one of the following: A plurality of SMTCs based on synchronization signal blocks, a SMTC period extension factor based on the synchronization signal block measurement timing configuration or a SMTC offset value based on the synchronization signal block measurement timing configuration, and ephemeris information of the first node; And, the dedicated synchronous reconfiguration includes at least one of the following information: The expansion factor and / or number of consecutive frames of the access opportunity RO corresponding to the access target area of ​​the mobility management process, and the offset value of the validity period of the F1 AP.

6. The method according to any one of claims 1 to 5, characterized in that The first terminal device receives the first information and the second information from the first node, including: In an initial access process of the first terminal device, the first terminal device receives the first information and the second information from the first node.

7. A communication method, characterized in that: include: The first node sends first information and second information to a first terminal device, wherein the first information includes public information for performing mobility management on at least one terminal device in at least one area corresponding to the second node, and the second information includes dedicated information for performing mobility management on the first terminal device, the at least one area includes an area served by the first node, and the at least one terminal device includes the first terminal device; The first node performs a mobility management process for the first terminal device in an area served by the first node based on a measurement report, wherein the measurement report is determined based on the first information and the second information; The first node sends the updated second information to the first terminal device.

8. The method according to claim 7, characterized in that The first node is a first satellite, and the second node is a second satellite or a ground station corresponding to the first satellite.

9. The method according to claim 7 or 8, characterized in that: The first information includes at least one of the following information: The interface F1 between the second node and at least one node applies the identification of the protocol AP, the common measurement configuration, the common cell group configuration, Common radio bearer configuration, and common synchronization reconfiguration; wherein the at least one node includes the first node; And, the second information includes at least one of the following information: A dedicated measurement configuration of the first terminal device, a dedicated cell group configuration of the first terminal device, a dedicated radio bearer configuration of the first terminal device, and a dedicated synchronization reconfiguration of the first terminal device.

10. The method according to claim 9, characterized in that The public measurement configuration includes at least one of the following information: A measurement timing configuration SMTC based on a synchronization signal block, location information of the second node, and a measurement priority of the at least one area; And, the common synchronous reconfiguration includes at least one of the following information: The time domain configuration, preamble or frequency domain configuration of the access opportunity RO corresponding to the access target area in the mobility management process, and the validity period of the F1AP.

11. The method according to claim 9, characterized in that The dedicated measurement configuration includes at least one of the following: A plurality of SMTCs based on synchronization signal blocks, a SMTC period extension factor based on the synchronization signal block measurement timing configuration or a SMTC offset value based on the synchronization signal block measurement timing configuration, and ephemeris information of the first node; And, the dedicated synchronous reconfiguration includes at least one of the following information: The expansion factor and / or number of consecutive frames of the access opportunity RO corresponding to the access target area of ​​the mobility management process, and the offset value of the validity period of the F1 AP.

12. The method according to any one of claims 7 to 11, characterized in that The method further comprises: The first node receives the first information from the second node.

13. The method according to claim 12, characterized in that The first node receiving the first information from the second node includes: In an initial access process of the first terminal device, the first node receives the first information from the second node.

14. The method according to any one of claims 7 to 13, characterized in that The first node sends the first information and the second information to the first terminal device, including: In an initial access process of the first terminal device, the first node sends the first information and the second information to the first terminal device.

15. A communication method, characterized in that: include: The first terminal device receives first information and second information from the first node, the first information including public information for performing mobility management on at least one terminal device in at least one area corresponding to the second node, the second information including dedicated information for performing mobility management on the first terminal device, the at least one area including an area served by the first node, and the at least one terminal device including the first terminal device; The first terminal device performs a mobility management process from an area served by the first node to a first area based on the first information and the second information, where the first area is an area served by a third node; The first terminal device receives third information from the third node, where the third information includes dedicated information for mobility management of the first terminal device, the third information is determined by the third node, and the at least one area includes an area served by the third node.

16. The method according to claim 15, characterized in that The first node is a first satellite, the second node is a second satellite or a ground station corresponding to the first satellite, and the third node is a third satellite.

17. The method according to claim 15 or 16, characterized in that The first information includes at least one of the following information: an identifier of an F1 interface application protocol between the second node and at least one node, a common measurement configuration, a common cell group configuration, a common radio bearer configuration, and a common synchronization reconfiguration; Wherein, the at least one node includes the first node and the third node; And, the third information includes at least one of the following information: A dedicated measurement configuration of the first terminal device, a dedicated cell group configuration of the first terminal device, a dedicated radio bearer configuration of the first terminal device, and a dedicated synchronization reconfiguration of the first terminal device.

18. The method according to claim 17, characterized in that The public measurement configuration includes at least one of the following information: A measurement timing configuration SMTC based on a synchronization signal block, location information of the second node, and a measurement priority of the at least one area; And, the common synchronous reconfiguration includes at least one of the following information: The time domain configuration, preamble or frequency domain configuration of the access opportunity RO corresponding to the access target area in the mobility management process, and the validity period of the F1AP.

19. The method according to claim 17, characterized in that The dedicated measurement configuration includes at least one of the following: A plurality of SMTCs, an SMTC period extension factor or an SMTC offset value, and ephemeris information of the first node; And, the dedicated synchronous reconfiguration includes at least one of the following information: The expansion factor and / or number of consecutive frames of the access opportunity RO corresponding to the access target area of ​​the mobility management process, and the offset value of the validity period of the F1 AP.

20. The method according to any one of claims 15 to 19, characterized in that The first terminal device receives the first information and the second information from the first node, including: In an initial access process of the first terminal device, the first terminal device receives the first information and the second information from the first node.

21. A communication method, characterized in that: include: The third node executes a mobility management process for a first terminal device from an area served by the first node to a first area, the first area being an area served by the third node, the execution of the mobility management process being determined based on first information and second information, the first information comprising public information for performing mobility management on at least one terminal device in at least one area corresponding to the second node, the second information comprising dedicated information for performing mobility management on the first terminal device, the second information being determined by the first node, the at least one area comprising an area served by the first node and an area served by the third node, and the at least one terminal device comprising the first terminal device; The third node sends third information to the first terminal device, where the third information includes dedicated information for performing mobility management on the first terminal device, and the third information is determined by the third node.

22. The method according to claim 21, characterized in that The first node is a first satellite, the second node is a second satellite or a ground station corresponding to the first satellite, and the third node is a third satellite.

23. The method according to claim 21 or 22, characterized in that The first information includes at least one of the following information: The interface F1 between the second node and at least one node applies the identification of the protocol AP, the common measurement configuration, the common cell group configuration, the common radio bearer configuration, and the common synchronization reconfiguration; Wherein, the at least one node includes the first node and the third node; And, the third information includes at least one of the following information: A dedicated measurement configuration of the first terminal device, a dedicated cell group configuration of the first terminal device, a dedicated radio bearer configuration of the first terminal device, and a dedicated synchronization reconfiguration of the first terminal device.

24. The method according to claim 23, characterized in that The public measurement configuration includes at least one of the following information: A measurement timing configuration SMTC based on a synchronization signal block, location information of the second node, and a measurement priority of the at least one area; And, the common synchronous reconfiguration includes at least one of the following information: The time domain configuration, preamble or frequency domain configuration of the access opportunity RO corresponding to the access target area in the mobility management process, and the validity period of the F1AP.

25. The method according to claim 23, characterized in that The dedicated measurement configuration includes at least one of the following: A plurality of SMTCs based on synchronization signal blocks, a SMTC period extension factor based on the synchronization signal block measurement timing configuration or a SMTC offset value based on the synchronization signal block measurement timing configuration, and ephemeris information of the first node; And, the dedicated synchronous reconfiguration includes at least one of the following information: The expansion factor and / or number of consecutive frames of the access opportunity RO corresponding to the access target area of ​​the mobility management process, and the offset value of the validity period of the F1 AP.

26. The method according to any one of claims 21 to 25, characterized in that The first information and the second information are sent by the first node during the initial access process of the first terminal device.

27. A communication device, characterized in that: Including transceiver unit and processing unit, The transceiver unit is used to receive first information and second information from a first node, the first information including public information for performing mobility management on at least one terminal device in at least one area corresponding to the second node, the second information including dedicated information for performing mobility management on the first terminal device, the at least one area including an area served by the first node, and the at least one terminal device The device includes the first terminal device; The processing unit is configured to execute a mobility management process within an area served by the first node based on the first information and the second information; The transceiver unit is further configured to receive updated second information from the first node.

28. The device according to claim 27, characterized in that The first node is a first satellite, and the second node is a second satellite or a ground station corresponding to the first satellite.

29. The device according to claim 27 or 28, characterized in that The first information includes at least one of the following information: The interface F1 between the first node and at least one node applies the identification of the protocol AP, the common measurement configuration, the common cell group configuration, the common radio bearer configuration, and the common synchronization reconfiguration; wherein the at least one node includes the first node; And, the second information includes at least one of the following information: A dedicated measurement configuration of the device, a dedicated cell group configuration of the device, a dedicated radio bearer configuration of the device, and a dedicated synchronization reconfiguration of the device.

30. The device according to claim 29, characterized in that The public measurement configuration includes at least one of the following information: A measurement timing configuration SMTC based on a synchronization signal block, location information of the second node, and a measurement priority of the at least one area; And, the common synchronous reconfiguration includes at least one of the following information: The time domain configuration, preamble or frequency domain configuration of the access opportunity RO corresponding to the access target area in the mobility management process, and the validity period of the F1AP.

31. The device according to claim 29, characterized in that The dedicated measurement configuration includes at least one of the following: A plurality of SMTCs based on synchronization signal blocks, a SMTC period extension factor based on the synchronization signal block measurement timing configuration or a SMTC offset value based on the synchronization signal block measurement timing configuration, and ephemeris information of the first node; And, the dedicated synchronous reconfiguration includes at least one of the following information: The expansion factor and / or number of consecutive frames of the access opportunity RO corresponding to the access target area of ​​the mobility management process, and the offset value of the validity period of the F1 AP.

32. The device according to any one of claims 27 to 31, characterized in that The transceiver unit is specifically used for: In an initial access process of the device, the first information and the second information are received from the first node.

33. A communication device, characterized in that: Including transceiver unit and processing unit, The transceiver unit is used to send first information and second information to a first terminal device, the first information including public information for performing mobility management on at least one terminal device in at least one area corresponding to the second node, and the second information including dedicated information for performing mobility management on the first terminal device, the at least one area including an area served by the apparatus, and the at least one terminal device including the first terminal device; The processing unit is used to perform a mobility management process of the first terminal device in the area served by the first node based on a measurement report, wherein the measurement report is determined based on the first information and the second information; The transceiver unit is further used to send the updated second information to the first terminal device.

34. The device according to claim 33, characterized in that The device is a first satellite, and the second node is a second satellite or a ground station corresponding to the first satellite.

35. The device according to claim 33 or 34, characterized in that The first information includes at least one of the following information: The interface F1 between the second node and at least one node applies the identification of the protocol AP, the common measurement configuration, the common cell group configuration, the common radio bearer configuration, and the common synchronization reconfiguration; wherein the at least one node comprises the device; And, the second information includes at least one of the following information: A dedicated measurement configuration of the first terminal device, a dedicated cell group configuration of the first terminal device, a dedicated radio bearer configuration of the first terminal device, and a dedicated synchronization reconfiguration of the first terminal device.

36. The device according to claim 35, characterized in that The public measurement configuration includes at least one of the following information: A measurement timing configuration SMTC based on a synchronization signal block, location information of the second node, and a measurement priority of the at least one area; And, the common synchronous reconfiguration includes at least one of the following information: The time domain configuration, preamble or frequency domain configuration of the access opportunity RO corresponding to the access target area in the mobility management process, and the validity period of the F1AP.

37. The device according to claim 35, characterized in that The dedicated measurement configuration includes at least one of the following: A plurality of SMTCs based on synchronization signal blocks, a SMTC period extension factor based on the synchronization signal block measurement timing configuration or a SMTC offset value based on the synchronization signal block measurement timing configuration, and ephemeris information of the first node; And, the dedicated synchronous reconfiguration includes at least one of the following information: The expansion factor and / or number of consecutive frames of the access opportunity RO corresponding to the access target area of ​​the mobility management process, and the offset value of the validity period of the F1 AP.

38. The device according to any one of claims 33 to 37, characterized in that The transceiver unit is also used for: The first information is received from the second node.

39. The device according to claim 38, characterized in that The transceiver unit is specifically used for: During an initial access process of the first terminal device, the first information is received from the second node.

40. The device according to any one of claims 33 to 39, characterized in that The transceiver unit is specifically used for: In an initial access process of the first terminal device, the first information and the second information are sent to the first terminal device.

41. A communication device, characterized in that: Including transceiver unit and processing unit, The transceiver unit is used to receive first information and second information from the first node, the first information including public information for performing mobility management on at least one terminal device in at least one area corresponding to the second node, and the second information including dedicated information for performing mobility management on the device, the at least one area including an area served by the first node, and the at least one terminal device including the device; The processing unit is used to perform a mobility management process from an area served by the first node to a first area based on the first information and the second information, where the first area is an area served by a third node; The transceiver unit is further configured to receive third information from the third node, wherein the third information includes dedicated information for performing mobility management on the device, the third information is determined by the third node, and the at least one area includes an area served by the third node.

42. The device according to claim 41, characterized in that The first node is a first satellite, the second node is a second satellite or a ground station corresponding to the first satellite, and the third node is a third satellite.

43. The device according to claim 41 or 42, characterized in that The first information includes at least one of the following information: an identifier of an F1 interface application protocol between the second node and at least one node, a common measurement configuration, a common cell group configuration, a common radio bearer configuration, and a common synchronization reconfiguration; Wherein, the at least one node includes the first node and the third node; And, the third information includes at least one of the following information: A dedicated measurement configuration of the device, a dedicated cell group configuration of the device, a dedicated radio bearer configuration of the device, and a dedicated synchronization reconfiguration of the device.

44. The device according to claim 43, characterized in that The public measurement configuration includes at least one of the following information: A measurement timing configuration SMTC based on a synchronization signal block, location information of the second node, and a measurement priority of the at least one area; And, the common synchronous reconfiguration includes at least one of the following information: The time domain configuration, preamble or frequency domain configuration of the access opportunity RO corresponding to the access target area in the mobility management process, and the validity period of the F1AP.

45. The device according to claim 43, characterized in that The dedicated measurement configuration includes at least one of the following: A plurality of SMTCs, an SMTC period extension factor or an SMTC offset value, and ephemeris information of the first node; And, the dedicated synchronous reconfiguration includes at least one of the following information: The expansion factor and / or number of consecutive frames of the access opportunity RO corresponding to the access target area of ​​the mobility management process, and the offset value of the validity period of the F1 AP.

46. ​​The device according to any one of claims 41 to 45, characterized in that The transceiver unit is specifically used for: In an initial access process of the device, the first information and the second information are received from the first node.

47. A communication device, characterized in that: Including transceiver unit and processing unit: The processing unit is used to execute a mobility management process of the first terminal device from the area served by the first node to the first area, The first area is an area served by the device, and execution of the mobility management process is determined based on first information and second information, the first information includes public information for performing mobility management on at least one terminal device in at least one area corresponding to the second node, and the second information includes dedicated information for performing mobility management on the first terminal device, the second information is determined by the first node, the at least one area includes an area served by the first node and an area served by the device, and the at least one terminal device includes the first terminal device; The transceiver unit is used to send third information to the first terminal device, where the third information includes dedicated information for performing mobility management on the first terminal device, and the third information is determined by the apparatus.

48. The device according to claim 47, characterized in that The first node is a first satellite, the second node is a second satellite or a ground station corresponding to the first satellite, and the device is a third satellite.

49. The device according to claim 47 or 48, characterized in that The first information includes at least one of the following information: The interface F1 between the second node and at least one node applies the identification of the protocol AP, the common measurement configuration, the common cell group configuration, the common radio bearer configuration, and the common synchronization reconfiguration; wherein the at least one node includes the first node and the device; And, the third information includes at least one of the following information: A dedicated measurement configuration of the first terminal device, a dedicated cell group configuration of the first terminal device, a dedicated radio bearer configuration of the first terminal device, and a dedicated synchronization reconfiguration of the first terminal device.

50. The device according to claim 49, characterized in that The public measurement configuration includes at least one of the following information: A measurement timing configuration SMTC based on a synchronization signal block, location information of the second node, and a measurement priority of the at least one area; And, the common synchronous reconfiguration includes at least one of the following information: The time domain configuration, preamble or frequency domain configuration of the access opportunity RO corresponding to the access target area in the mobility management process, and the validity period of the F1AP.

51. The device according to claim 49, characterized in that The dedicated measurement configuration includes at least one of the following: A plurality of SMTCs based on synchronization signal blocks, a SMTC period extension factor based on the synchronization signal block measurement timing configuration or a SMTC offset value based on the synchronization signal block measurement timing configuration, and ephemeris information of the first node; And, the dedicated synchronous reconfiguration includes at least one of the following information: The expansion factor and / or number of consecutive frames of the access opportunity RO corresponding to the access target area of ​​the mobility management process, and the offset value of the validity period of the F1 AP.

52. The device according to any one of claims 47 to 51, characterized in that The first information and the second information are sent by the first node during the initial access process of the first terminal device.

53. A communication device, characterized in that: include: At least one processor, wherein the at least one processor is used to execute a computer program stored in a memory so that the device performs the method as described in any one of claims 1 to 6; or performs the method as described in any one of claims 7 to 14; or performs the method as described in any one of claims 15 to 20; or performs the method as described in any one of claims 21 to 26.

54. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, which, when executed, causes the device to execute the method as described in any one of claims 1 to 6; or execute the method as described in any one of claims 7 to 14; or execute the method as described in any one of claims 15 to 20; or execute the method as described in any one of claims 21 to 26.

55. A chip system, characterized in that: include: A processor, used to call and run a computer program from a memory so that a communication device equipped with the chip system executes a method as described in any one of claims 1 to 6; or executes a method as described in any one of claims 7 to 14; or executes a method as described in any one of claims 15 to 20; or executes a method as described in any one of claims 21 to 26.

56. A communication system, characterized in that: It includes at least one of a first node, a third node and a first terminal device, the first node is used to execute the method as described in any one of claims 1 to 6, the third node is used to execute the method as described in any one of claims 7 to 14, and the first terminal device is used to execute the method as described in any one of claims 15 to 20, or execute the method as described in any one of claims 21 to 26.

57. A computer program product, characterized in that The computer program product comprises a computer program or instructions, and when the computer program or instructions are executed on a communication device, the communication device is caused to perform the method according to any one of claims 1 to 26.

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